Program 9 B.Sc Computer Science with Data analytics Linux and Shell Programming - Lab Bharathiar University - Write a shell script to check whether given string is palindrome or not.

 

B.Sc Computer Science  with Data analytics

Linux and Shell Programming - Lab  

Bharathiar University 

Program 9-  Write a shell script to check whether given string is palindrome or not. 

Source Code

# Main program starts here

# Prompt the user to enter the string

    echo "Enter the string: "

    read str

    reversed=$(echo "$str" | rev)

    if [ "$str" = "$reversed" ]; then

        echo "The string '$str' is a palindrome."

    else

        echo "The string '$str' is not a palindrome."

    fi

Sample OUTPUT:

Program 8 B.Sc Computer Science with Data analytics Linux and Shell Programming - Lab Bharathiar University - Write a shell script to find the GCD of two given numbers.

 

B.Sc Computer Science  with Data analytics

Linux and Shell Programming - Lab  

Bharathiar University 

Program 8-  Write a shell script to find the GCD of two given numbers. 

Source Code

 # Function to find the GCD using the Euclidean algorithm

gcd() {

    dividend=$1

    divisor=$2

    while [ $divisor -ne 0 ]; do

        remainder=$((dividend % divisor))

        dividend=$divisor

        divisor=$remainder

    done

    echo "$dividend"

}

# Main program starts here

# Prompt the user to enter the first number

    echo "Enter the first number: "

    read num1

    # Prompt the user to enter the second number

    echo "Enter the second number: "

    read num2

   

# Find the GCD of the two numbers

result=$(gcd $num1 $num2)

echo "The GCD of $num1 and $num2 is: $result"

Sample Output:

Program 7 B.Sc Computer Science with Data analytics Linux and Shell Programming - Lab Bharathiar University - Write a Shell script to print the first n Fibonacci numbers

 

B.Sc Computer Science  with Data analytics

Linux and Shell Programming - Lab  

Bharathiar University 

Program 7- Write a Shell script to print the first n Fibonacci numbers

Source Code

# Function to print the first n Fibonacci numbers

print_fibonacci() {

    # Initialize variables for the first two Fibonacci numbers

    num1=0

    num2=1

    count=0

    # Print the first two Fibonacci numbers

    echo "The first $n Fibonacci numbers are:"

    echo "$num1"

    echo "$num2"

    # Calculate and print the remaining Fibonacci numbers

    while [ $count -lt $(($n - 2)) ]; do

        next=$((num1 + num2))

        echo "$next"

        num1=$num2

        num2=$next

        count=$((count + 1))

    done

}

# Main program starts here

# Prompt the user to enter the number

    echo "Enter the a number of fibonacci series to print: "

    read n

# Check if n is a positive integer

if  [[ "$n" -lt 1 ]]; then

    echo "Error: Please provide a positive integer."

    exit 1

fi

# Print the first n Fibonacci numbers

print_fibonacci $n

Sample Output:

Program 6 B.Sc Computer Science with Data analytics Linux and Shell Programming - Lab Bharathiar University - Write a Shell script to determine whether a given number is a prime number or not.

 

B.Sc Computer Science  with Data analytics

Linux and Shell Programming - Lab  

Bharathiar University 

Program 6- Write a Shell script to determine whether a given number is a prime number or not.

Source Code

# Function to check if a number is prime

is_prime() {

    if [ $1 -le 1 ]; then

        echo "$1 is not a prime number."

        exit 0

    fi

   

    d=2

    while [ $d -lt $1 ]; do

        if [ $(($1 % $d)) -eq 0 ]; then

            echo "$1 is not a prime number."

            exit 0

        fi

        d=$((d + 1))

    done

    echo "$1 is a prime number."

}

# Main program starts here

# Prompt the user to enter the number

    echo "Enter the number: "

    read number

   

# Check if the number is prime

is_prime $number

Sample output:

Program 5 B.Sc Computer Science with Data analytics Linux and Shell Programming - Lab Bharathiar University -Write a shell script (small calculator) that adds, subtracts, multiplies and divides the two given numbers.

 

B.Sc Computer Science  with Data analytics

Linux and Shell Programming - Lab  

Bharathiar University 

Program 5- -Write a shell script (small calculator) that adds, subtracts, multiplies and divides the two given numbers. 

Source Code

# Function to perform addition

addition() {

    echo "$num1 + $num2" | bc

}

# Function to perform subtraction

subtraction() {

    echo "$num1 - $num2" | bc

}

# Function to perform multiplication

multiplication() {

    echo "$num1 * $num2" | bc

}

# Function to perform division

division() {

    if [ "$num2" -eq 0 ]; then

        echo "Error: Division by zero!"

    else

        echo "scale=2; $num1 / $num2" | bc

    fi

}

# Main script starts here

# Prompt the user to enter the first number

echo "Enter the first number: "

    read num1

    # Prompt the user to enter the second number

    echo "Enter the second number: "

    read num2

       

while true; do

    # Prompt the user to select the operation

    echo "Select the operation:"

    echo "1. Addition"

    echo "2. Subtraction"

    echo "3. Multiplication"

    echo "4. Division"

    echo "5. Exit"

    echo "Enter your choice: "

    read choice

       

    case $choice in

        1) echo "Addition: $(addition)";;

        2) echo "Subtraction: $(subtraction)";;

        3) echo "Multiplication: $(multiplication)";;

        4) echo "Division: $(division)";;

        5) echo "Exiting..."; exit;;

        *) echo "Invalid choice";;

    esac

done

SAMPLE OUTPUT: